Remote Sensing

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  • Q1

    What is an image?

    Marks:1
    Answer:

    An image is the permanent record of a scene comprising of natural and man-made feature and activities, produced by photographic and non-photographic means.

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  • Q2

    Define sensors.

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    Answer:

    A sensor is a device that gathers electromagnetic radiations and converts it into a signal that can be recorded and displayed as photographic or digital image. It is then presented in a form suitable for obtaining information about the objects under investigation.

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  • Q3

    What do you mean by the spectral band?

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    Answer:

    The range of the wavelengths in the continuous spectrum is known as spectral band. The green band ranges from 0.5 to 0.6μ and the range of NIR band is 0.7 to 1.1μ.

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  • Q4

    What is a digital image?

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    Answer:

    Digital image is an array of digital numbers arranged in rows and columns. It has the property of an intensity value and their locations.

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  • Q5

    What is remote sensing?

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    Answer:

    Remote sensing is the science of gathering information about objects from a distance without coming into physical contact with them. It includes data gathered through photographs taken from aeroplanes and satellites.

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